See, if you are going for a higher education in a field which is related to Computer Science, then you are definitely expected to know a thing or two about Computers. So, if you want to learn the prerequisites of the degree, then you may freely follow the below tips:

1. Learn about the basics of computers

2. Learn about some of the programming languages, pick one of your choice and master it by the time your degree becomes.

3. Learn maths as CS is a heavily mathematics oriented field.

4. Practice a lot and become comfortable with computers.

Hope I have answered your question. All the best!